What's the benefit of balanced tonearm cables?

Or pseudo balanced rca as apparently my arm cables are. I have no idea what anyone is saying! I asked a techie and he said a cartridge can only be left and right so not balanced and the arm guy responded and said my arms are pseudo balanced, so pretty well nearly fully balanced. As I have no way of comparing or altering it is yet another one of those wierd techie issues that drive us normal people to distraction if we stop long enough to wonder what they are all saying.